Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. The operating pressure for refrigerating units using R-12 as a refrigerant is

2. The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

3. The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

4. The freezing point of sulphur dioxide is

5. The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

6. The condition of refrigerant after passing through the condenser in a vapour compression system is

7. A human body feels comfortable when the heat produced by the metabolism of human body is equal to the

8. The capillary tube, as an expansion device, is used in

9. A thermostatic expansion valve in a refrigeration system

10. If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be


 

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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